字符串处理——（第一次作业Draw输入命令处理部分升级）

#include<iostream>
#include<sstream>  //使用istringstream必须包含的头文件 
#include<string>
#include<stdlib.h>
#include<vector>
using namespace std;

//模板函数：将string类型变量转换为常用的数值类型  by maowei
template <class Type>
Type stringToNum(const string& str)
{
    istringstream iss(str);
    Type num;
    iss>>num;
    return num;
}


int main(int argc,char *argv[]){
    string com;
    vector<string> info(0);
    getline(cin,com);
    int start=0,end=0;//手工编写解读字符串信息的函数 
while(start!=string::npos&&start!=com.size()){
    start=com.find_first_not_of(' ',start);
        end=com.find_first_of(' ',start);
    if(end==string::npos){end=com.size();}
        info.push_back(com.substr(start,end-start));
        start=end;        
}
cout<<"info_size="<<info.size()<<endl;
cout<<"info_capacitity="<<info.capacity()<<endl;
for(int j=0;j<info.size();++j)cout<<info[j]<<endl;

//test_template
string s="123";
double x = stringToNum<double>(s);
cout<<"x="<<x<<endl;

vector<string> info_1;

istringstream is(com);//采用istringstream从string对象str中读取字符 
string s2;
while(is>>s2){cout<<s2<<endl;info_1.push_back(s2);}

cout<<"info_1_size="<<info_1.size()<<endl;
cout<<"info_1_capacitity="<<info_1.capacity()<<endl;
for(int j=0;j<info.size();++j)cout<<info_1[j]<<endl;

    return 0;
}